diff --git a/cli/unstable_prompt_multiple_select.ts b/cli/unstable_prompt_multiple_select.ts
index 76dc3607d898..1587045b88c1 100644
--- a/cli/unstable_prompt_multiple_select.ts
+++ b/cli/unstable_prompt_multiple_select.ts
@@ -28,6 +28,8 @@ const SHOW_CURSOR = encoder.encode("\x1b[?25h");
 /**
  * Shows the given message and waits for the user's input. Returns the user's selected value as string.
  *
+ * @typeParam T The type of the array elements.
+ *
  * @param message The prompt message to show to the user.
  * @param values The values for the prompt.
  * @param options The options for the prompt.
@@ -40,11 +42,11 @@ const SHOW_CURSOR = encoder.encode("\x1b[?25h");
  * const browsers = promptMultipleSelect("Please select browsers:", ["safari", "chrome", "firefox"], { clear: true });
  * ```
  */
-export function promptMultipleSelect(
+export function promptMultipleSelect<T extends string>(
   message: string,
-  values: string[],
+  values: readonly T[],
   options: PromptMultipleSelectOptions = {},
-): string[] | null {
+): T[] | null {
   if (!input.isTerminal()) return null;
 
   const { clear } = options;
@@ -103,5 +105,5 @@ export function promptMultipleSelect(
   output.writeSync(SHOW_CURSOR);
   input.setRaw(false);
 
-  return [...selectedIndexes].map((it) => values[it] as string);
+  return [...selectedIndexes].map((it) => values[it] as string) as T[];
 }
diff --git a/cli/unstable_prompt_multiple_select_test.ts b/cli/unstable_prompt_multiple_select_test.ts
index 1e0320aefac3..f7585f986955 100644
--- a/cli/unstable_prompt_multiple_select_test.ts
+++ b/cli/unstable_prompt_multiple_select_test.ts
@@ -644,3 +644,33 @@ Deno.test("promptMultipleSelect() returns null if Deno.stdin.isTerminal() is fal
   assertEquals(expectedOutput, actualOutput);
   restore();
 });
+
+Deno.test("promptMultipleSelect() check return types", () => {
+  stub(Deno.stdin, "setRaw");
+  stub(Deno.stdin, "isTerminal", () => false);
+
+  promptMultipleSelect("Please select a browser:", [
+    "safari",
+    "chrome",
+    "firefox",
+  ]) satisfies ("safari" | "chrome" | "firefox")[] | null;
+
+  const browsers = ["safari", "chrome", "firefox"] as const;
+  promptMultipleSelect("Please select a browsers:", browsers) satisfies
+    | ("safari" | "chrome" | "firefox")[]
+    | null;
+
+  promptMultipleSelect("Please select a browsers:", [
+    ...browsers,
+    "edge",
+  ]) satisfies
+    | ("safari" | "chrome" | "firefox" | "edge")[]
+    | null;
+
+  const selectItems = ["safari", "chrome", "firefox"];
+  promptMultipleSelect("Please select a browsers:", selectItems) satisfies
+    | string[]
+    | null;
+
+  restore();
+});
diff --git a/cli/unstable_prompt_select.ts b/cli/unstable_prompt_select.ts
index 7644c171c88f..e375defded86 100644
--- a/cli/unstable_prompt_select.ts
+++ b/cli/unstable_prompt_select.ts
@@ -29,6 +29,8 @@ const SHOW_CURSOR = encoder.encode("\x1b[?25h");
 /**
  * Shows the given message and waits for the user's input. Returns the user's selected value as string.
  *
+ * @typeParam T The type of the array elements.
+ *
  * @param message The prompt message to show to the user.
  * @param values The values for the prompt.
  * @param options The options for the prompt.
@@ -48,11 +50,11 @@ const SHOW_CURSOR = encoder.encode("\x1b[?25h");
  * ], { clear: true, visibleLines: 3, indicator: "*" });
  * ```
  */
-export function promptSelect(
+export function promptSelect<T extends string>(
   message: string,
-  values: string[],
+  values: readonly T[],
   options: PromptSelectOptions = {},
-): string | null {
+): T | null {
   if (!input.isTerminal()) return null;
 
   const SAFE_PADDING = 3;
diff --git a/cli/unstable_prompt_select_test.ts b/cli/unstable_prompt_select_test.ts
index eab084f7dd3e..471ec81e29f4 100644
--- a/cli/unstable_prompt_select_test.ts
+++ b/cli/unstable_prompt_select_test.ts
@@ -816,3 +816,33 @@ Deno.test("promptSelect() handles ETX", () => {
   assertEquals(expectedOutput, actualOutput);
   restore();
 });
+
+Deno.test("promptSelect() check return types", () => {
+  stub(Deno.stdin, "setRaw");
+  stub(Deno.stdin, "isTerminal", () => false);
+
+  promptSelect("Please select a browser:", [
+    "safari",
+    "chrome",
+    "firefox",
+  ]) satisfies "safari" | "chrome" | "firefox" | null;
+
+  const browsers = ["safari", "chrome", "firefox"] as const;
+  promptSelect("Please select a browser:", browsers) satisfies
+    | "safari"
+    | "chrome"
+    | "firefox"
+    | null;
+
+  promptSelect("Please select a browser:", [...browsers, "edge"]) satisfies
+    | "safari"
+    | "chrome"
+    | "firefox"
+    | "edge"
+    | null;
+
+  const selectItems = ["safari", "chrome", "firefox"];
+  promptSelect("Please select a browser:", selectItems) satisfies string | null;
+
+  restore();
+});